\begin{table}%t1
\caption{\label{tab:gal}The galaxy samples considered.}
%\centering
\par
\begin{tabular}{ccc}
\hline\hline
\noalign{\smallskip}
\textbf{Sample} & \textbf{n.o.\ galaxies} & \textbf{Magnitude cut}\\
\hline
\texttt{lv8m12} & 315 & $M_B\le-12$ \\
\texttt{lv8m14} & 205 & $M_B\le-14$ \\
\texttt{lv8m15} & 133 & $M_B\le-15$ \\
\texttt{lv8m16} & 96  & $M_B\le-16$ \\
\hline
\end{tabular}
\end{table}